/*
 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
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 *
 *
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 *
 *
 *
 *
 *
 *
 *
 */

package java.util.jar;

import java.io.IOException;
import java.util.zip.ZipEntry;
import java.security.CodeSigner;
import java.security.cert.Certificate;

/**
 * This class is used to represent a JAR file entry.
 */
public class JarEntry extends ZipEntry {

  Attributes attr;
  Certificate[] certs;
  CodeSigner[] signers;

  /**
   * Creates a new <code>JarEntry</code> for the specified JAR file
   * entry name.
   *
   * @param name the JAR file entry name
   * @throws NullPointerException if the entry name is <code>null</code>
   * @throws IllegalArgumentException if the entry name is longer than 0xFFFF bytes.
   */
  public JarEntry(String name) {
    super(name);
  }

  /**
   * Creates a new <code>JarEntry</code> with fields taken from the
   * specified <code>ZipEntry</code> object.
   *
   * @param ze the <code>ZipEntry</code> object to create the <code>JarEntry</code> from
   */
  public JarEntry(ZipEntry ze) {
    super(ze);
  }

  /**
   * Creates a new <code>JarEntry</code> with fields taken from the
   * specified <code>JarEntry</code> object.
   *
   * @param je the <code>JarEntry</code> to copy
   */
  public JarEntry(JarEntry je) {
    this((ZipEntry) je);
    this.attr = je.attr;
    this.certs = je.certs;
    this.signers = je.signers;
  }

  /**
   * Returns the <code>Manifest</code> <code>Attributes</code> for this
   * entry, or <code>null</code> if none.
   *
   * @return the <code>Manifest</code> <code>Attributes</code> for this entry, or <code>null</code>
   * if none
   * @throws IOException if an I/O error has occurred
   */
  public Attributes getAttributes() throws IOException {
    return attr;
  }

  /**
   * Returns the <code>Certificate</code> objects for this entry, or
   * <code>null</code> if none. This method can only be called once
   * the <code>JarEntry</code> has been completely verified by reading
   * from the entry input stream until the end of the stream has been
   * reached. Otherwise, this method will return <code>null</code>.
   *
   * <p>The returned certificate array comprises all the signer certificates
   * that were used to verify this entry. Each signer certificate is
   * followed by its supporting certificate chain (which may be empty).
   * Each signer certificate and its supporting certificate chain are ordered
   * bottom-to-top (i.e., with the signer certificate first and the (root)
   * certificate authority last).
   *
   * @return the <code>Certificate</code> objects for this entry, or <code>null</code> if none.
   */
  public Certificate[] getCertificates() {
    return certs == null ? null : certs.clone();
  }

  /**
   * Returns the <code>CodeSigner</code> objects for this entry, or
   * <code>null</code> if none. This method can only be called once
   * the <code>JarEntry</code> has been completely verified by reading
   * from the entry input stream until the end of the stream has been
   * reached. Otherwise, this method will return <code>null</code>.
   *
   * <p>The returned array comprises all the code signers that have signed
   * this entry.
   *
   * @return the <code>CodeSigner</code> objects for this entry, or <code>null</code> if none.
   * @since 1.5
   */
  public CodeSigner[] getCodeSigners() {
    return signers == null ? null : signers.clone();
  }
}
